US5649407A - Apparatus for sealing thermoplastic-coated packaging material - Google Patents

Apparatus for sealing thermoplastic-coated packaging material Download PDF

Info

Publication number
US5649407A
US5649407A US08/301,394 US30139494A US5649407A US 5649407 A US5649407 A US 5649407A US 30139494 A US30139494 A US 30139494A US 5649407 A US5649407 A US 5649407A
Authority
US
United States
Prior art keywords
jaw
conductors
sealing
packaging material
inductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/301,394
Inventor
Peter Blomqvist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Assigned to TETRA LAVAL HOLDINGS & FINANCE SA reassignment TETRA LAVAL HOLDINGS & FINANCE SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLOMQVIST, PETER
Application granted granted Critical
Publication of US5649407A publication Critical patent/US5649407A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8322Joining or pressing tools reciprocating along one axis
    • B29C66/83221Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/84Specific machine types or machines suitable for specific applications
    • B29C66/849Packaging machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02Aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12Paper, e.g. cardboard
    • B29K2711/123Coated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00Layered products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00Layered products
    • B29L2009/003Layered products comprising a metal layer

Definitions

  • the present invention relates to an apparatus for sealing a thermoplastic-coated material, with at least one layer of a metal foil.
  • packaging materials comprising outer layers of thermoplastic, these outer layers being capable of being sealed together by fusion after heating and compression for providing tight and durable sealing joints or seams.
  • a material may be fed in web form through a filling machine and formed into a tube which is longitudinally sealed by means of a lap joint.
  • This material tube is filled with its contemplated contents, whereafter the tube is transversely sealed and severed to form individual packages which, in a later stage, are finally formed, for example into parallelepipedic packages or cartons.
  • a packaging material including a metal foil, preferably aluminium foil, is ideally employed when the transverse seals are made by so-called induction sealing.
  • An apparatus for such induction sealing is disclosed and described in Swedish Patent Specification SE 451 973.
  • an induction current is induced in the aluminium layer of the packaging material, this current heating the thermoplastic layer disposed adjacent the aluminium layer so that the thermoplastic layer can be sealed to a corresponding thermoplastic layer.
  • One object of the present invention is to provide an apparatus for induction sealing which is suitable for use together with products which are highly viscous or which contain particles such as kernels, fruit seeds or fibres and in which the transverse seal of the package is made such that no sealing flaps or fins are created where product residues may gather.
  • the apparatus of the type described by way of introduction includes three conductors, these being disposed such that the current density in the conductors is approximately equal.
  • FIG. 1 is a cross sectional through an inductor according to an embodiment of the present invention.
  • FIG. 2 is a partially cross-sectional view of an apparatus according to an embodiment of the present invention, showing how packaging material is sealed using an inductor according to the present invention.
  • FIG. 1 An inductor 1 according to the invention is shown in FIG. 1.
  • the inductor 1 displays three substantially parallel conductors 2, 3 which are disposed in an electrically insulating carrier layer 4 which, in its interior, houses a core 5 of a ferrite material.
  • the core 5 of ferrite material is insulated from the three conductors 2, 3.
  • Both of the outer conductors 2 display a gently rounded cross section or alternatively a square or rectangular cross section.
  • Both of the outer conductors 2 accommodate cooling ducts 6 in their interior, these being intended for coolant.
  • the central conductor 3 is of substantially U-shaped appearance.
  • Each conductor displays, on its upper surface 7, a bead or ridge 14 which projects above the surrounding surface 7 a distance of approx. 0.3 mm.
  • the three conductors 2 and 3 are preferably connected in parallel to a high frequency alternating current source (not shown). In such instance, a considerably higher current force will be obtained in the central conductor 3, but because of the configuration of the central conductor 3 (with the upwardly open U), an inductor 1 will be obtained in which conductors 2, 3 have approximately the same current density on the upper surface 7.
  • An inductor 1 according to the present invention may also be connected in series or inductively by means of a capacitor.
  • the inductor 1 is reinforced by a steel body 8 and the entire inductor 1 is disposed in a sealing jaw 9 to which may be imparted the desired sealing movement and which may exert the desired sealing pressure.
  • the sealing jaw 9 is operative to move towards a likewise movable counter jaw 10.
  • the packaging material 11 which is intended to be transversely sealed is advanced between the sealing jaw 9 and the counter jaw 10.
  • the packaging material 11 is disposed between the two jaws 9 and 10 such that two thermoplastic layers 12 which are intended to be fused or sealed together are oriented towards one another.
  • the packaging material 11 When the two sealing jaws 9 and 10 move towards one another and there entrap between them the packaging material 11 which is to be transversely sealed, a seal will be created in three substantially parallel sealing lines wherein the centremost is of largest extent.
  • the ridges 14 disposed on the conductors When the two sealing jaws 9 and 10 are urged towards one another, the ridges 14 disposed on the conductors will locally exert a slightly greater compressive force and will contribute in creating a more reliable and tighter sealing of the packaging material 11.
  • the packaging material 11 is intended to be severed in the centremost sealing joint or seam, in that a knife 13 disposed in the movable counter jaw 10 moves down through the material 11 into the U-shaped groove of the central conductor 3.
  • any possible product residues will be enclosed between the transverse seal of the outer conductors 2 and the transverse seal of the central conductor 3.
  • any possible product residues will be enclosed in a material which is just as aseptic as the remainder of the package and will not constitute any obstacle to the filling of products containing, for example, fibres, fruit seeds or kernels into the containers.
  • the package severed in the central sealing joint or seam will not display any sealing fin where product residues may gather.
  • the present invention realizes an apparatus for transverse sealing of packaging blanks in which no sealing fin or flap is created on severing of the packaging blanks to form individual packages.
  • a transverse seal will here be obtained which is well suited in the filling of contents of high viscosity or contents which contain particles such as fruit seeds, kernels or fibres.

Abstract

An apparatus for sealing a thermoplastic-coated packaging material, the material having at least one layer of a metal foil, includes an inductor having at least three substantially parallel, spaced apart conductors. A method for forming sealed, filled packages and a method for sealing packaging material are also provided.

Description

TECHNICAL FIELD
The present invention relates to an apparatus for sealing a thermoplastic-coated material, with at least one layer of a metal foil.
BACKGROUND ART
It has long been known in the packaging industry to employ packaging materials comprising outer layers of thermoplastic, these outer layers being capable of being sealed together by fusion after heating and compression for providing tight and durable sealing joints or seams. For example, such a material may be fed in web form through a filling machine and formed into a tube which is longitudinally sealed by means of a lap joint. This material tube is filled with its contemplated contents, whereafter the tube is transversely sealed and severed to form individual packages which, in a later stage, are finally formed, for example into parallelepipedic packages or cartons.
A packaging material including a metal foil, preferably aluminium foil, is ideally employed when the transverse seals are made by so-called induction sealing. An apparatus for such induction sealing is disclosed and described in Swedish Patent Specification SE 451 973. In this instance, an induction current is induced in the aluminium layer of the packaging material, this current heating the thermoplastic layer disposed adjacent the aluminium layer so that the thermoplastic layer can be sealed to a corresponding thermoplastic layer.
The above-described method of transversely sealing packaging blanks as described in the above-disclosed patent specification has, however, proved to be unsuitable for highly viscous products and products containing particles such as kernels, fruit seeds or fibres. According to the above-described method, two substantially parallel transverse seals are made between which the packaging tube is severed to form individual packaging blanks. In this instance, sealing flaps or fins are created which lie outside the transverse seals and where product residues may accumulate. These product residues can, on storage of the package, take on a highly disagreeable and unhealthy appearance.
OBJECT OF THE INVENTION
One object of the present invention is to provide an apparatus for induction sealing which is suitable for use together with products which are highly viscous or which contain particles such as kernels, fruit seeds or fibres and in which the transverse seal of the package is made such that no sealing flaps or fins are created where product residues may gather.
SOLUTION
This and other objects have been attained according to the present invention in that the apparatus of the type described by way of introduction includes three conductors, these being disposed such that the current density in the conductors is approximately equal.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
One preferred embodiment of the present invention will now be described in greater detail hereinbelow, with particular reference to the accompanying Drawing, in which:
FIG. 1 is a cross sectional through an inductor according to an embodiment of the present invention; and
FIG. 2 is a partially cross-sectional view of an apparatus according to an embodiment of the present invention, showing how packaging material is sealed using an inductor according to the present invention.
The Drawings show only those details essential to an understanding of the present invention, the arrangement of the inductor in a filling machine (which is well-known to a person skilled in the art) having been omitted.
DESCRIPTION OF PREFERRED EMBODIMENT
An inductor 1 according to the invention is shown in FIG. 1. The inductor 1 displays three substantially parallel conductors 2, 3 which are disposed in an electrically insulating carrier layer 4 which, in its interior, houses a core 5 of a ferrite material. The core 5 of ferrite material is insulated from the three conductors 2, 3. Both of the outer conductors 2 display a gently rounded cross section or alternatively a square or rectangular cross section. Both of the outer conductors 2 accommodate cooling ducts 6 in their interior, these being intended for coolant. The central conductor 3 is of substantially U-shaped appearance. Each conductor displays, on its upper surface 7, a bead or ridge 14 which projects above the surrounding surface 7 a distance of approx. 0.3 mm.
The three conductors 2 and 3 are preferably connected in parallel to a high frequency alternating current source (not shown). In such instance, a considerably higher current force will be obtained in the central conductor 3, but because of the configuration of the central conductor 3 (with the upwardly open U), an inductor 1 will be obtained in which conductors 2, 3 have approximately the same current density on the upper surface 7.
An inductor 1 according to the present invention may also be connected in series or inductively by means of a capacitor.
The inductor 1 is reinforced by a steel body 8 and the entire inductor 1 is disposed in a sealing jaw 9 to which may be imparted the desired sealing movement and which may exert the desired sealing pressure. The sealing jaw 9 is operative to move towards a likewise movable counter jaw 10. The packaging material 11 which is intended to be transversely sealed is advanced between the sealing jaw 9 and the counter jaw 10. The packaging material 11 is disposed between the two jaws 9 and 10 such that two thermoplastic layers 12 which are intended to be fused or sealed together are oriented towards one another.
When the two sealing jaws 9 and 10 move towards one another and there entrap between them the packaging material 11 which is to be transversely sealed, a seal will be created in three substantially parallel sealing lines wherein the centremost is of largest extent. When the two sealing jaws 9 and 10 are urged towards one another, the ridges 14 disposed on the conductors will locally exert a slightly greater compressive force and will contribute in creating a more reliable and tighter sealing of the packaging material 11. The packaging material 11 is intended to be severed in the centremost sealing joint or seam, in that a knife 13 disposed in the movable counter jaw 10 moves down through the material 11 into the U-shaped groove of the central conductor 3.
After transverse sealing employing an inductor 1 according to the present invention, any possible product residues will be enclosed between the transverse seal of the outer conductors 2 and the transverse seal of the central conductor 3. In such instance any possible product residues will be enclosed in a material which is just as aseptic as the remainder of the package and will not constitute any obstacle to the filling of products containing, for example, fibres, fruit seeds or kernels into the containers. The package severed in the central sealing joint or seam will not display any sealing fin where product residues may gather.
As has been apparent from the foregoing description, the present invention realizes an apparatus for transverse sealing of packaging blanks in which no sealing fin or flap is created on severing of the packaging blanks to form individual packages. In this instance, a transverse seal will here be obtained which is well suited in the filling of contents of high viscosity or contents which contain particles such as fruit seeds, kernels or fibres.
The present invention should not be considered as restricted to that described above and shown on the Drawing, many modifications being conceivable without departing from the spirit and scope of the appended claims.

Claims (14)

What is claimed is:
1. An apparatus for sealing a thermoplastic-coated packaging material, the material having at least one layer of a metal foil, the apparatus comprising:
an inductor having at least three substantially parallel, spaced apart conductors, a center one of the three conductors being substantially U-shaped with two sealing edges and a groove therebetween facing outwardly from the inductor; and
means for cutting packaging material, the cutting means and the inductor defining a gap, the packaging material extending through the gap, the cutting means having a cutting blade having a cutting edge disposed on an opposite side of the packaging material from the groove and means for moving the cutting blade, the cutting blade being movable relative to the inductor by the moving means such that at least part of cutting edge is received in the groove when the cutting means cuts the packaging material and as the three conductors form four seals in the packaging material and such that the cutting means cuts the packaging material to form a double seal on opposite sides of a cut formed by the cutting means, a thickness of the part of the cutting blade substantially corresponding to a width of the groove such that sides of the cutting blade are substantially adjacent interior walls of the groove when the cutting edge is received in the groove.
2. The apparatus claimed in claim 1, wherein the conductors are connected in parallel.
3. The apparatus claimed in claim 1, wherein the conductors are connected in series.
4. The apparatus claimed in claim 1, wherein the conductors are inductively connected to one another.
5. The apparatus claimed in claim 4, wherein the conductors are inductively connected by a capacitor.
6. The apparatus as claimed in claim 1, further comprising a sealing jaw and a counter jaw, the sealing jaw being movable toward and away from the counter jaw, the sealing jaw and the counter jaw receiving the material therebetween, the inductor being disposed in the sealing jaw.
7. The apparatus as claimed in claim 1, wherein the conductors include longitudinally projecting ridges projecting above a surface of the inductor, a compression force against the material being locally increased in a vicinity of the ridges.
8. The apparatus as claimed in claim 7, wherein the ridges project approximately 0.3 mm above the surface of the inductor.
9. The apparatus as set forth in claim 1, wherein a current density in each of the conductors is approximately equal.
10. The apparatus as set forth in claim 1, wherein the inductor further comprises a core of a magnetic material and an electrically insulating carrier portion.
11. An apparatus for sealing together facing thermoplastic surfaces of thermoplastic-coated packaging material, the material having at least one layer of a metal foil, the apparatus comprising:
an inductor having at least three substantially parallel, spaced-apart conductors, a center one of the three conductors being substantially U-shaped with a groove defined by two legs, each of the legs having a sealing edge, facing outwardly from the inductor;
a sealing jaw, the inductor being disposed in the sealing jaw;
a counter jaw, the packaging material being received between the sealing jaw and the counter jaw;
means for moving at least one of the sealing jaw and the counter jaw such that the sealing jaw and the counter jaw are disposed substantially adjacent to each other, the inductors forming four seals in packaging material disposed between the sealing jaw and the counter jaw when the sealing jaw and the counter jaw are disposed substantially adjacent to each other; and
further comprising cutting means for cutting through the packaging material between a center two of the seals formed by the legs of the center one of the three conductors as the seals are formed, the cutting means including a cutting blade and second means for moving the cutting blade at the same time that the inductors form four seals in the packaging material, the cutting blade being movable relative to the sealing jaw by the second moving means and being at least partially receivable between the legs of the center one of the three conductors when the sealing jaw and the counter jaw are disposed substantially adjacent to each other, the cutting blade having a thickness substantially corresponding to a width of the groove such that sides of the cutting blade are substantially adjacent interior walls of the groove when the cutting blade is at least partially received in the groove.
12. The apparatus as set forth in claim 11, wherein the conductors include longitudinally projecting ridges projecting above a surface of the inductor, a compression force against the packaging material being locally increased in a vicinity of the ridges.
13. The apparatus as set forth in claim 11, wherein the cutting blade is at least partially disposed in the counter jaw.
14. The apparatus as set forth in claim 13, wherein the cutting blade is movable relative to the counter jaw.
US08/301,394 1993-09-08 1994-09-08 Apparatus for sealing thermoplastic-coated packaging material Expired - Lifetime US5649407A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9302894 1993-09-08
SE9302894A SE501712C2 (en) 1993-09-08 1993-09-08 Device for sealing thermoplastic coated packaging material

Publications (1)

Publication Number Publication Date
US5649407A true US5649407A (en) 1997-07-22

Family

ID=20391010

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/301,394 Expired - Lifetime US5649407A (en) 1993-09-08 1994-09-08 Apparatus for sealing thermoplastic-coated packaging material

Country Status (10)

Country Link
US (1) US5649407A (en)
EP (1) EP0642914B1 (en)
JP (1) JP3631268B2 (en)
AT (1) ATE148026T1 (en)
BR (1) BR9403474A (en)
DE (1) DE69401554T2 (en)
DK (1) DK0642914T3 (en)
ES (1) ES2098087T3 (en)
GR (1) GR3022369T3 (en)
SE (1) SE501712C2 (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5889263A (en) * 1996-03-20 1999-03-30 Tetra Laval Holdings & Finance S.A. Apparatus and a method for induction sealing
US5968399A (en) * 1995-10-17 1999-10-19 Tetra Laval Holdings & Finance, S.A. Inductor for induction sealing of packing material
US6079185A (en) * 1998-07-31 2000-06-27 Tetra Laval Holdings & Finance, Sa Induction heat sealing of a closure to a container
WO2000064753A1 (en) 1999-04-26 2000-11-02 International Paper Company Packaging machine
US6301859B1 (en) * 1998-04-27 2001-10-16 Ishida Co., Ltd. Heat sealer for synthetic resin bag
US6725630B2 (en) 2001-11-15 2004-04-27 Sonoco Development, Inc. Method for induction sealing a plastic part to a composite container
US20040182046A1 (en) * 2001-06-18 2004-09-23 Andrea Babini Induction sealing device for heat sealing packaging material
US6876896B1 (en) 1999-04-26 2005-04-05 Ab Tetrapak Variable motion system and method
US20050241277A1 (en) * 2001-12-05 2005-11-03 Keiji Yano Seal apparatus
US7178316B2 (en) * 1999-09-30 2007-02-20 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
US20070068632A1 (en) * 2003-05-09 2007-03-29 George Bertram Sealing device
US20110088352A1 (en) * 2007-11-15 2011-04-21 Bernhard Zeiler Packaging Machine and Packages Made Therewith
US20110177435A1 (en) * 2010-01-20 2011-07-21 International Business Machines Corporation Photomasks having sub-lithographic features to prevent undesired wafer patterning
DE102011100364A1 (en) * 2010-11-04 2012-05-10 Kiefel Gmbh Separation welding tool, method for separating welding, separating welding system and product produced therewith
US20160101883A1 (en) * 2013-04-03 2016-04-14 Jt International S.A. Packaging apparatus and method
JP2016514631A (en) * 2013-03-20 2016-05-23 テトラ・ラヴァル・ホールディングス・アンド・ファイナンス・ソシエテ・アノニムTetra Laval Holdings & Finance S.A. Ceiling bar
US20170240309A1 (en) * 2014-09-23 2017-08-24 Tetra Laval Holdings & Finance S.A. Sealing element for heat sealing packaging material for producing sealed packages
US10160162B2 (en) * 2013-04-10 2018-12-25 Tetra Laval Holdings & Finance S.A. Induction sealing device and method for manufacturing an induction sealing device
US10899082B2 (en) 2017-07-17 2021-01-26 Tetra Laval Holdings & Finance S.A. Inductor coil for induction welding of a packaging material
US10994495B2 (en) 2015-11-27 2021-05-04 Tetra Laval Holdings & Finance S.A. Sealing device with increased robustness
US11370571B2 (en) 2017-07-18 2022-06-28 Tetra Laval Holdings & Finance S.A. Induction sealing device
US11534985B2 (en) 2016-05-02 2022-12-27 Tetra Laval Holdings & Finance S.A. Induction sealing system
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11820540B2 (en) 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3857363B2 (en) * 1996-09-17 2006-12-13 四国化工機株式会社 Filling and packaging equipment
FI107044B (en) * 1997-10-09 2001-05-31 United Packaging Plc Machine in a wrapping machine
JP4643841B2 (en) * 2001-02-27 2011-03-02 四国化工機株式会社 High frequency heat seal device
SE526058C8 (en) 2002-12-13 2005-07-27 Tetra Laval Holdings & Finance Method and apparatus for making packaging
SE528872C2 (en) * 2005-07-08 2007-03-06 Tetra Laval Holdings & Finance Cross-sealing device and method
EP3131739B1 (en) * 2014-04-16 2020-10-07 Tetra Laval Holdings & Finance SA Induction sealing device and method of sealing a packaging material using said induction sealing device

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385897A (en) * 1942-09-04 1945-10-02 Harry F Waters Continuous filling and packaging machine
US2618814A (en) * 1948-08-13 1952-11-25 James B Paton Method of packaging comminuted materials in containers of extruded thermoplastic materials
DE1187980B (en) * 1962-08-18 1965-02-25 Hamac Hansella Ag Device for producing the cross weld seams in packaging machines
US3195285A (en) * 1961-10-11 1965-07-20 Hamac Hansella Ag Method of forming transverse heat seals on tubular thermoplastic material, and apparaus therefor
US3876486A (en) * 1973-12-06 1975-04-08 William Pennington Heat sealing of plastic sheets
US4060443A (en) * 1972-05-23 1977-11-29 Tetra Pak International Ab Device for the heat-sealing of thermoplastic material or paper material coated with thermoplastics
US4266389A (en) * 1977-11-29 1981-05-12 Tetra Pak International Ab Method and an arrangement for the advancing of a packing material web through a packing machine
US4384438A (en) * 1979-07-25 1983-05-24 Tetra Pak International Ab Arrangement on packing machines
WO1987001093A1 (en) * 1985-08-13 1987-02-26 Franca Branchi Process for producing prism-shaped containers with flat gable-shaped surfaces without side-projections
US4704509A (en) * 1985-08-22 1987-11-03 Tetra Pak International Ab Induction apparatus and method for sealing of thermoplastic coated packing material
US5015223A (en) * 1989-12-06 1991-05-14 Zip-Pak, Incorporated Hotseal jaws and cutoff knife assembly for processing thermoplastic film bag making material
EP0455907A2 (en) * 1990-05-09 1991-11-13 Frank Deni Vacuum sealer
US5268058A (en) * 1992-01-23 1993-12-07 Quality Containers International, Inc. Crytoplate seal bar
US5284002A (en) * 1992-02-25 1994-02-08 Simple Packaging Solutions, Inc. Apparatus and method for making a reclosable storage bag

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2385897A (en) * 1942-09-04 1945-10-02 Harry F Waters Continuous filling and packaging machine
US2618814A (en) * 1948-08-13 1952-11-25 James B Paton Method of packaging comminuted materials in containers of extruded thermoplastic materials
US3195285A (en) * 1961-10-11 1965-07-20 Hamac Hansella Ag Method of forming transverse heat seals on tubular thermoplastic material, and apparaus therefor
DE1187980B (en) * 1962-08-18 1965-02-25 Hamac Hansella Ag Device for producing the cross weld seams in packaging machines
US4060443A (en) * 1972-05-23 1977-11-29 Tetra Pak International Ab Device for the heat-sealing of thermoplastic material or paper material coated with thermoplastics
US3876486A (en) * 1973-12-06 1975-04-08 William Pennington Heat sealing of plastic sheets
US4266389A (en) * 1977-11-29 1981-05-12 Tetra Pak International Ab Method and an arrangement for the advancing of a packing material web through a packing machine
US4384438A (en) * 1979-07-25 1983-05-24 Tetra Pak International Ab Arrangement on packing machines
WO1987001093A1 (en) * 1985-08-13 1987-02-26 Franca Branchi Process for producing prism-shaped containers with flat gable-shaped surfaces without side-projections
US4704509A (en) * 1985-08-22 1987-11-03 Tetra Pak International Ab Induction apparatus and method for sealing of thermoplastic coated packing material
SE451973B (en) * 1985-08-22 1987-11-09 Tetra Pak Ab DEVICE AND PROCEDURE FOR INDUCTION SEALING THERMOPLASTIC COATED MATERIALS INCLUDING ATMINSTONE ONE LAYER OF METAL WRAP
US5015223A (en) * 1989-12-06 1991-05-14 Zip-Pak, Incorporated Hotseal jaws and cutoff knife assembly for processing thermoplastic film bag making material
EP0455907A2 (en) * 1990-05-09 1991-11-13 Frank Deni Vacuum sealer
US5268058A (en) * 1992-01-23 1993-12-07 Quality Containers International, Inc. Crytoplate seal bar
US5284002A (en) * 1992-02-25 1994-02-08 Simple Packaging Solutions, Inc. Apparatus and method for making a reclosable storage bag

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5968399A (en) * 1995-10-17 1999-10-19 Tetra Laval Holdings & Finance, S.A. Inductor for induction sealing of packing material
US5889263A (en) * 1996-03-20 1999-03-30 Tetra Laval Holdings & Finance S.A. Apparatus and a method for induction sealing
US6301859B1 (en) * 1998-04-27 2001-10-16 Ishida Co., Ltd. Heat sealer for synthetic resin bag
US6079185A (en) * 1998-07-31 2000-06-27 Tetra Laval Holdings & Finance, Sa Induction heat sealing of a closure to a container
WO2000064753A1 (en) 1999-04-26 2000-11-02 International Paper Company Packaging machine
WO2000064662A2 (en) 1999-04-26 2000-11-02 International Paper Company Induction sealing jaw
US6876896B1 (en) 1999-04-26 2005-04-05 Ab Tetrapak Variable motion system and method
US7178316B2 (en) * 1999-09-30 2007-02-20 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
US7059100B2 (en) * 2001-06-18 2006-06-13 Tetra Laval Holdings & Finance Sa Induction sealing device for heat sealing packaging material
US20040182046A1 (en) * 2001-06-18 2004-09-23 Andrea Babini Induction sealing device for heat sealing packaging material
US6725630B2 (en) 2001-11-15 2004-04-27 Sonoco Development, Inc. Method for induction sealing a plastic part to a composite container
US20050241277A1 (en) * 2001-12-05 2005-11-03 Keiji Yano Seal apparatus
US7389623B2 (en) * 2001-12-05 2008-06-24 Tetra Laval Holdings & Finance S.A. Seal apparatus
US8124915B2 (en) * 2003-05-09 2012-02-28 Pregis Intellipack Corporation Sealing device
US20070068632A1 (en) * 2003-05-09 2007-03-29 George Bertram Sealing device
US9027314B2 (en) 2007-11-15 2015-05-12 Milliken & Company Packaging machine and packages made therewith
US9028935B2 (en) 2007-11-15 2015-05-12 Milliken & Company Packaging machine and packages made therewith
US20110088352A1 (en) * 2007-11-15 2011-04-21 Bernhard Zeiler Packaging Machine and Packages Made Therewith
US20110177435A1 (en) * 2010-01-20 2011-07-21 International Business Machines Corporation Photomasks having sub-lithographic features to prevent undesired wafer patterning
DE102011100364A1 (en) * 2010-11-04 2012-05-10 Kiefel Gmbh Separation welding tool, method for separating welding, separating welding system and product produced therewith
US10293529B2 (en) 2013-03-20 2019-05-21 Tetra Laval Holdings & Finance S.A. Sealing bar
JP2016514631A (en) * 2013-03-20 2016-05-23 テトラ・ラヴァル・ホールディングス・アンド・ファイナンス・ソシエテ・アノニムTetra Laval Holdings & Finance S.A. Ceiling bar
US10954010B2 (en) * 2013-04-03 2021-03-23 Jt International S.A. Packaging apparatus and method
US20160101883A1 (en) * 2013-04-03 2016-04-14 Jt International S.A. Packaging apparatus and method
US10160162B2 (en) * 2013-04-10 2018-12-25 Tetra Laval Holdings & Finance S.A. Induction sealing device and method for manufacturing an induction sealing device
US20170240309A1 (en) * 2014-09-23 2017-08-24 Tetra Laval Holdings & Finance S.A. Sealing element for heat sealing packaging material for producing sealed packages
US10994495B2 (en) 2015-11-27 2021-05-04 Tetra Laval Holdings & Finance S.A. Sealing device with increased robustness
US11534985B2 (en) 2016-05-02 2022-12-27 Tetra Laval Holdings & Finance S.A. Induction sealing system
US10899082B2 (en) 2017-07-17 2021-01-26 Tetra Laval Holdings & Finance S.A. Inductor coil for induction welding of a packaging material
US11370571B2 (en) 2017-07-18 2022-06-28 Tetra Laval Holdings & Finance S.A. Induction sealing device
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11820540B2 (en) 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

Also Published As

Publication number Publication date
SE501712C2 (en) 1995-05-02
SE9302894D0 (en) 1993-09-08
EP0642914B1 (en) 1997-01-22
DE69401554T2 (en) 1997-05-15
SE9302894L (en) 1995-03-09
ES2098087T3 (en) 1997-04-16
JP3631268B2 (en) 2005-03-23
DK0642914T3 (en) 1997-02-10
ATE148026T1 (en) 1997-02-15
GR3022369T3 (en) 1997-04-30
EP0642914A1 (en) 1995-03-15
BR9403474A (en) 1995-05-16
JPH07164524A (en) 1995-06-27
DE69401554D1 (en) 1997-03-06

Similar Documents

Publication Publication Date Title
US5649407A (en) Apparatus for sealing thermoplastic-coated packaging material
US5889263A (en) Apparatus and a method for induction sealing
RU2291091C2 (en) Induction welder for thermal welding of packing material
EP2445821B1 (en) Strip splicing
EP1241100B1 (en) Ultrasonic transverse sealing method and device for sealing walls of a packaging material filled with a pourable food product
US3457132A (en) Apparatus for severing and sealing webs of heat sealable packaging material in a single operation
EP1241098B1 (en) Ultrasonic transverse sealing device and method for sealing walls of a packaging material filled with a pourable food product
EP0359057B1 (en) A method and an arrangement for the manufacture of a laminated material strip
EP0730946A2 (en) Heat-sealing device for liquid-filled tube
MX2007014924A (en) Device and method for transverse sealing.
MX2010011364A (en) Sealing jaw for producing sealed packages of a food product.
GB1327280A (en) Method of and means for sealing packaging material
CN108541249B (en) Method and machine for producing sealed packages
US5260535A (en) Apparatus for induction welding
JPH07164523A (en) Device for heat-sealing packaging laminate
US4338766A (en) Apparatus and method for producing a container for foods and the like
EP3219630B1 (en) A method of operating a packaging machine for producing sealed packages
EP3597551B1 (en) Sheet packaging material for producing sealed packages for pourable food products, sealed package for pourale food products and method of manufacturing a sealed package for pourable products
JP2503842Y2 (en) Easy-open packaging bag
CN116323157A (en) Pressure element and sealing device for a packaging assembly having a pressure element
US20020148204A1 (en) Method and apparatus for forming, filing and sealing tubular packaging
US3372077A (en) Method of manufacturing packages
CA2105897A1 (en) Hole punch for end seal pouch

Legal Events

Date Code Title Description
AS Assignment

Owner name: TETRA LAVAL HOLDINGS & FINANCE SA, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLOMQVIST, PETER;REEL/FRAME:007195/0307

Effective date: 19940905

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REFU Refund

Free format text: REFUND - 11.5 YR SURCHARGE - LATE PMT W/IN 6 MO, LARGE ENTITY (ORIGINAL EVENT CODE: R1556); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: REFUND - PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: R1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 12